A line chart displays temperature measurements over the course of a week in San Francisco, with circles marking each data point. The visualization uses React components for rendering SVG elements and D3 v5 scales, including `scaleTime` for the x-axis and `scaleLinear` for the y-axis. The line path is generated with D3's `line()` function and `curveNatural` interpolation, while data is loaded as CSV from a remote gist and parsed with custom row conversion.